干旱区生态环境知识资源中心(Arid): Carbon fixation and influencing factors of biological soil crusts in a revegetated area of the Tengger Desert,northern China

Arid

	Carbon fixation and influencing factors of biological soil crusts in a revegetated area of the Tengger Desert,northern China
	Huang Lei; Zhang Zhishan; Li Xinrong
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:6 页码:725-734
英文摘要	Biological soil crusts(BSCs) are an important type of land cover in arid desert landscapes and play an important role in the carbon source-sink exchange within a desert system. In this study, two typical BSCs, moss crusts and algae crusts, were selected from a revegetated sandy area of the Tengger Desert in northern China, and the experiment was carried out over a 3-year period from January 2010 to November 2012. We obtained the effective active wetting time to maintain the physiological activity of BSCs basing on continuous field measurements and previous laboratory studies on BSCs photosynthesis and respiration rates. And then we developed a BSCs carbon fixation model that is driven by soil moisture. The results indicated that moss crusts and algae crusts had significant effects on soil moisture and temperature dynamics by decreasing rainfall infiltration. The mean carbon fixation rates of moss and algae crusts were 0.21 and 0.13 g C/(m~2·d), respectively. The annual carbon fixations of moss crusts and algae crusts were 64.9 and 38.6 g C/(m~2·a), respectively, and the carbon fixation of non-rainfall water reached 11.6 g C/(m~2·a)(30.2% of the total) and 8.8 g C/(m~2·a)(43.6% of the total), respectively. Finally, the model was tested and verified with continuous field observations. The data of the modeled and measured CO_2 fluxes matched notably well. In desert regions, the carbon fixation is higher with high-frequency rainfall even the total amount of seasonal rainfall was the same.
英文关键词	moss crusts algae crusts soil moisture dynamics non-rainfall water effective wetting time
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:5264384
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335412
作者单位	Huang Lei, Shapotou Desert Research and Experimental Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, Gansu 730000, China.; Zhang Zhishan, Shapotou Desert Research and Experimental Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, Gansu 730000, China.; Li Xinrong, Shapotou Desert Research and Experimental Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Huang Lei,Zhang Zhishan,Li Xinrong. Carbon fixation and influencing factors of biological soil crusts in a revegetated area of the Tengger Desert,northern China[J],2014,6(6):725-734.
APA	Huang Lei,Zhang Zhishan,&Li Xinrong.(2014).Carbon fixation and influencing factors of biological soil crusts in a revegetated area of the Tengger Desert,northern China.Journal of Arid Land,6(6),725-734.
MLA	Huang Lei,et al."Carbon fixation and influencing factors of biological soil crusts in a revegetated area of the Tengger Desert,northern China".Journal of Arid Land 6.6(2014):725-734.